| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024ˈcross ˌsection, n. [countable]- Mathematicsa slice of something made by cutting across it, esp. at right angles to the longest part:This photo is a cross section of the brain.
- a representative sample or example showing all characteristic parts, etc., of the whole:tried to determine what would appeal to a large cross section of voters.
WordReference Random House Unabridged Dictionary of American English © 2024cross′ sec′tion, - a section made by a plane cutting anything transversely, esp. at right angles to the longest axis.
- a piece so cut off.
- a photograph, diagram, or other pictorial representation of such a section.
- the act of cutting anything across.
- a typical selection;
a sample showing all characteristic parts, relationships, etc.:a cross section of American opinion. - Surveyinga vertical section of the ground surface taken at right angles to a survey line.
- PhysicsAlso called nuclear cross section. a quantity expressing the effective area that a given nucleus presents as a target to a bombarding particle, giving a measure of the probability that the particle will induce a reaction.
cross-sec•tion (krôs′sek′shən, kros′-),USA pronunciation adj. - SurveyingAlso, cross′-sec′tion•al. of or pertaining to a cross section.
v.t. - Surveyingto make or divide into a cross section.
Collins Concise English Dictionary © HarperCollins Publishers:: cross section n - a plane surface formed by cutting across a solid, esp perpendicular to its longest axis
- a section cut off in this way
- the act of cutting anything in this way
- a random selection or sample, esp one regarded as representative
ˌcross-ˈsectional adj |